Parting strip for roadways or the like



Dec. 1, 1936. J. H. JAcoBsON ET AL PARTING STRIP FOR ROADWAYS OR THE LIKE Filed Feb. l0, 1934 I ffe? I.. n.

Patented Dec. .1, 1 9-36 luw 2,062,654 j y l PARTINc.v s'rmrron RoAnwAYs on James H. Jacobson and Erle E. Hall; v chicago, nl.

3 l' Application Februarylo, 1934, Serial No. `710,687

zclaims. (ci. :a4-41s) y y shown in Figure 1, illustrating the same as. itis y The invention relates to a parting strip or joint such as those now being employed in pavements, roadways or the like to provide means for dividing the pavement material to cause parting thereof alonga denite line.

The invention has among its various objects the provision of a jointfor achieving the above, the same being formed in such a manner as to assist in retaining the joint' in ar substantially perpendicular position relative to the sub-grade of the'roadway during the pouring of the paving material. c Y

An additional object is to form the point so that it accomplishes this last mentioned ad vantage and performs the added advantage of preventing relative vertical displacement of adjacent portions of the paving material at the joint after the parting of the paving material has taken place.

A further object of 'the invention is to combine a seal for the joint suchpas that above referred to, for sealing the crack formed, the seal having means for effecting a bond with the Y paving material, the seal providing means compensating for the movement of the paving material transversely of the joint and preventing inltration of V water, dirt, etc. at the separation of the pavement sections above the seal.

The invention also has as an object the forming of a parting strip or joint from a strip of 'material and the iashionin'g of the material to provide a stool with .a base for the support of the stool, which stool is fashioned with portions substantially in the plane of the opposite edgesof the base and which portions areadaptedto coopere ate with supporting stakes, the latter being driven into the sub-grade to thus temporarily support the device in a position substantially perpendicular to the sub-grade during the pouring of the paving material. It is also an object to provide for the support of dowel or shear bars by the joint.

The invention has these and other objects, all of which will be explained in detail, and more readily understood when read in conjunction with the accompanying drawing, which illustrates one embodiment of the invention, it being understood that changes and modications may be resorted to without departing from the spirit of the appended claims forming a part hereof.

In the drawing:

Figure 1 is a perspective view of a joint embodying the features of the invention, and,

Figure 2 is a vertical section through the joint applied to a pavement.

The embodiment of the invention illustratedl in the drawing contemplates the' use of 'a metallic strip, generally designated "|01 and termed a stool, which isffashioned tovprovide abas'e II lfor position upon `the sub-grade I2.` l

This metallic stripory stool isofa width some1 what less than the vthickness lof the -fpavement slab `supporting the joint in a substantially''fyertical` I3 and'thuswill provide an area` above thestool along which the slab will crack or sever, land-thus`lv cause cracking or separation'oi." the slab along a deiinite line. The stool Infis further v.forrnedi with a vertical longitudinallyextending portion or Wall I4, which extends upwardlyrfrom the" edge 'I5 of the base II, and terminates in a con-f' nection with the longitudinally extendingi porj termination of; the wall I4 to the wall portion j cated in a vertical plane which substantially' cortion I6 which projects at an anglefrom theupper '20 responds to the plane of theedge lIiiof-t1f1e.-base-.

'I'he stool I0 is further Vformed to provide a portion I9 which extends from 'the upperter' mination o1 the wall I'I to aplloximate'ly the. center of width ofthe base :I I, and` terminates in a longitudinally extending yportion 2ILfThis' portion 20 provides means uponwhich a seal,

generally designated =2I, may be mounted. The seal is provided with a plurality of indentations' 22' which are employed to'secure the sealto the` portion 20 ofthe stool I0. y -The material of the seal 2| is bent to form thelspaced' sidewalls-22` and 23. The upper portion20 of the stool I0, is

located in the space between these last men!l 1 tioned walls. The seal is, further-faslhionedlftoprovide the laterally extericiin'g;longitudinally` disposed flanges v24 and 25, each ofY which are provided with a plurality of openings 26.

It will be noted from an inspection of Figure 2 that one edge,l such as 21,. of these openings 26 is located in substantial vertical alignment with the wall portions, respectively designated I4 and I 'I, and also that the edges respectively designated I5 and I6 oi the base are .substantially in vertical alignment with the Walls I4 and I'I.

The relative arrangement of these last mentioned portions of the stool is employed to eiect engagement between the respective supporting stakes designated 28 and 29, the edges I5 and I8 of the base II, the wall portion I'I, and also the Wall portion I4 extending upwardly from the base, and will thus retain the stool Il) in its initial position or, in other words, in a position substaninto the sub-grade.

tially perpendicular to the plane of the surface of the sub-grade. In addition, this arrangement provides means which ensures maintaining the strip in this last mentioned position during the pouring of aggregate of whichthe pavement or slab may be formed. v

The stool I is provided with a plurality of apertures such as that designated 30, which are disposed at intervals throughout the length of the stool Il to receive the threaded end 3l, of a dowel socket 32. The opposite end of the dowel socket is formed with a downwardly'projecting spike 33, the free end of which may be driven A dowel or shear bar 34 is mounted in the dowel socket 32, it being understood that provision is made for allowing movement of the dowel bar 3.4 relatively to the socket 32 to thereby compensate for movement of the slab sections due to temperature changes and/or other factors after the slab has been severed above the seal 2l.

The stakes 23 and 29 are each provided with a lip 35, to thusprovide stops which limit the distance which the stakes may be driven into the sub-grade and assist in holding down the joint.

From the foregoing explanation of the structure it is believed evident that a parting strip is provided having means whereby it may beA arranged in proper position upon the sub-grade.

It is fin-ther apparent that the stool is formed to providelongitudinally extending walls such as I4 and I1, which provide means for cooperating with stakes, suchas 23 and 29, to thus assist in maintaining the parting strip in a substantially perpendicular position relative to the sub-grade, and which will maintain the joint in this position during the pouring of the aggregate of which the pavement or slab may be formed.

It is further manifest that the structure described provides means whereby a dowel bar socket and a dowel bar, may be associated with said device, and in which the dowel bar is bonded in the slab, and providing means for coupling the separated sections of the slab or roadway surface with each other. It is further believed that by fashioning the material of the stool to provide the portions Il, I 6, I1 and I 9, that a tongue and groove formation is produced in the adjacent ends of the slab sections which will effect what is termed aggregate interlock" and which will key the separated slab sections with each other and thereby assist in preventing relative dislacement of the slab sections in a vertical direc- Having thus described the invention, what we claim as new and desire to cover by Letters Patent is:-

1. In a concrete pavement or the like embodying the combination of a pair of adjacent conaooaersfiv crete sections cast in situ upon a base material, a joint separating and sealing the space intervening between said concrete sections, said joint comprising a stool and a seal capping an edge thereof, said seal consisting of an expansible member formed from a piece of flexible material bent upon itself to provide spaced walls movable relatively to each other at the bend, the material forming said walls being fashioned to provide an outwardly projecting apertured ange at the lower edge f each of said walls, said stool comprising a single plate, the upper termination thereof being located within the space between the spaced walls of the seal, said plate being corrugated thereby forming alternately spaced parallel ridges establishing a pair of spaced connected walls, a base for said stool, said base extending from one wall thereof to a point in a vertical line with the oppositely spaced wall, and a pair of substantially parallel supporting members positioned one on each side of the joint so formed, each supportingj member passing through an aperture in one outwardly projecting apertured flange of said seal and extending therefrom intothe base material and serving to position the joint while the plastic concrete is being poured, each of said supporting members having a bearing on the seal, a second bearing on one of the spaced walls of the stool, and a third bearing on the base of the stool, said supporting members adapted to be finally embedded in the pavement material.

2. In a concrete pavement or the like embodying the combination of a pair of adjacent concrete sections, a joint separating said concrete sections, and comprising a, stool and a seal capping an edge thereof, said seal being formed from a piece of material bent upon itself to provide spaced walls, an outwardly projecting flange extending from each of said walls, said stool comprising a single plate located within the space between the spaced walls of the seal, extending therefrom and being corrugated forming a series of alternate parallel ridges establishing a pair of spaced connected walls, a base for said stool, said base extending from one wall thereof to a point in a vertical line with the other spaced wall, and a pair of supporting members positioned one on each side of the joint so formed, each supporting member engaging an outwardly projecting flange of said seal and serving to position the joint while the plastic concrete is being poured, each of said supporting members having a bearing on the seal, a second bearing on one of the spaced walls of the stool, and a third bearing 0n the base of the stool.

JAMES H. JACOBSON. ERIC E. HALL. 

